Adjustable roller skate



FIG. 1 is a front elevational view of an adjustable roller skate showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a cross-sectional view thereof taken along line 3--3 in FIG. 4; and

FIG. 4 is a side elevational view thereof, the side opposite being substantially a mirror image. 

The ornamental design for an adjustable roller skate, as shown and described. 